Removable tension on narrow-ware shuttle



Aug. 3 192.6.l

UJ' an 5m a. am my* (lmwsk P. A. CARLSON F1led J an 28 I lle,

REMOVABLE TENSION ON NARROW WARE SHUTTLE a1mmmwmmnmmmmmnllnmnhmmnumlummm/1 mmm Patented Aug. 3, 1926.

UNITED srarss `IIEETER A. CARLSON, OF WORCESTER, MASSACHUSETTS,

*PATENT FFCE.

ASSIGN'OR TO CROMPTON d MASSACHUSETTS.

REMOVABLE TENSION ON NARROW-WARE SHUTTLE.V

Application sied January as, i925.` serial No. 5,359.

. This invention relatesto .improvements in shuttles for narrow ware looms` and more particularly' to tension devices therefor. e

It is the general object of my `invention to provide'a removabletension for shuttles of the type mentioned lto the'end that the friction elements can be replaced quickly without disguring the shuttle.

It is a further object of my invention to provide tension eleinentsmounted on a removable carrier and held in place by atension spring in such a manner asy to permit the removal of the holding means without disturbing the elements and their carrier, the spring' acting to hold the parts in assembled position independently of the holding screws. A .v

It isa still further and more detailed object of my invention to provide a tension for narrow ware shuttles wherein all of the l parts which contact with the yarn may be formed of porcelain, the movable porcelain blocks being replaceable on a removable stand of stronger material which is held out of contact with the yarn.

l/Vith these and other objects in view which will appear as the description proceeds, my invention resides in the. combination and arangeinent of parts hereinafter described and set forth` in the claims.

In the accompanying drawings wherein I have shown two forms of my invention,

F `1 is a top plan view of a narrow ware shuttle having my invention applied thereto, certain parts being shown in section,

Fig. 2. is a front elevation of the shuttle looking in the direction of arrow 2, F ig. 1,

Fig. 3 is an enlarged section on line 3-`3 of Fig. 2, i

. rig.

of my invention applied thereto, and

Fig. 6 is a section on line 6 6 of Fig. 5.

In carrying out my invention I provide a shuttle 10 having a cop receiving slot 11 at one end of which is located an eye 12 formed of porcelain or other suitable material communicating with the slot and extending through the body of the shuttle. A second or intermediate eye 13 extends through the front wall 111 of the shuttle and communi cates with a chamber 15 in which is located the tension device forming the subject mat- 4; is a section online of Fig. 3, Fig. 5 is a fragmentary enlarged front ele, vation of a shuttle `having a modified form.

ter of niy present invention. A third 0r delivery eye 16 is located `in the central portioiiof the forward wall 14C, and the eyes 12, 13 and 16 are disposed substantially in alignment to have threaded through them the weft `W as indicated in F ig. 1. 'A screw 17 extends from the wall '14 intothe body 10 of the shuttle and has threaded thereon a pair of nuts 18 and 19, respectively, between which extends one end of aspring 20 the free vend of which extendstowardthe other end of the chamber 15 and is held normally raised by the inclined position ofthe screwV 17. By adjusting nuts 18 and 19git is pos-` sible to vary the position and tension` of the spring 26. The matter thus far described is or the usual construction and forms no part of my present invention.

My invention .relates more particularly to the tension blocks which enO'aO'e that portion of the `weft W lying C t:

between eyes 13 and 16. In carrying out the preferred form of i my invention I provide the rear face of the front wall 111 with a shallow slot 3() which receives the base 31 of a carrier indicated generally at 32. Said base has a tapped hole 33 therein which receives screw 34 extending' through the wall 1i. Secured to the base` 31 arerpins 35 `which are parallel and of suicient length to extend to the rear of chamber 15.y Iioosely mounted on said pins 35 are front and rear friction blocks orelements 36 and 37, respectively, which have` holes .36 formed therein slightly larger 'than the pinsv 35. Spring jQO'eXtends behind tension element 37and serves to hold both of said elements forward. The pins 35 position the spring 20 and by lying in substantial contact with the rear wall of chamber 15 prevent accidental `displacement ,of said spring. l... 4 l

It i'sfound in practicethat the blocks 36 and 37, which areL usually formed `of porcelain, are subject to frequent breakage, ne-` cessitating renewal. I-Ieretofore said blocks have been mounted on pins which were fixed in the shuttle in such a way as to require the pins to be removed before the blocks or elements could be replaced, the removal of the pins frequently disfiguring the shuttle and enlarging the holes through which the pins pass. In the form of the invention already described when it is necessary to replace one of the tension elements'tlie screw 34 is removed, after which the base 31 can be moved vertically until the tension device is outside the chamber 15, after which the blocksl can 'be renewed and. the device rein,-`

sertedj held in place by the screw 3.4;-

Slot 30 prevents angular motion of the base 8l so that the pins 35 are always correctly positioned. It will be. noticed .that when screw 34 is removed the forward pressureV of the spring 20 will serve tohldth'e parts in place against wall 14rthis feature olf the invention permitting the operator to Aremove the screw 3l without 'disturbing the setting of the tension device. It' will further ber noticed that should the base'l and the blocks 36 and 37 slip when they arel being removedV the spring. 2O` will serve to throw them forwardly away from the loom.

In the modifiedr form of the invention shown in .lflfigsl 5 and, 6 the rear 'face of the front wall ofthe shuttle isN formed as usual `with no transverse slot but `there is projecting rearwardly therefroma pin 40 which is received; by a smalljslot 41 L.formed in one end of'carrier 42 toyprevent rotation of the carrier.v VThe carrier 42 and parts associated therewith are in all otherk respects similar to 'those shown in the preferred form of the invention.

From the` foregoing it will be seen thatl If have provided avery simple means for vmounting thefriction" blocks of a narrow ware shuttle in such aiway as to permit their renewal; without disguring the shuttle. It

will' also be seen that the lweft isv engagedVv a way that should they slip from the yopera-V tors hand they will bethrown forwardly.

I-aving thus described my invention it will be apparent that changes and modifications may be made therein by'thoseskilled in the art without departing vfrom the spirit and scope of the invention andk Il do not wish to'be limit-ed to the details herein disclosed,

` but what I claimjs:

l. In, a loomshuttle,ya pair of: guide. eyes,

friction blocks located between, the eyes, yielding mea-nsto hold said blocks together to exertiriction tension on the yarn, supporting. structure for the friction blocks', andmeansto holdasad structuretdetachably to the shuttle, said structure being removable in a direction transverse of the weft and guided in transverse .slot formed in the shuttle said slot determining the angular position or' thev guiding means and said structure. v

2. In= a shuttle orlooms, guide means for the yarn, relatively movable yblocks between which the yarn extends, yielding means toA holdl said'iblocks together, supporting structure for said blocks includingspaced'guides` for the yielding 'meansl between which-'the yielding means extends, 'and' means for detachably securing the structure tothev shuttle. 3. Ina shuttle for looms, vfriction blocks Jfor the yarn,A a Vpair of spacedl guides forthe blocks,a tension spring mountedV on the shuttle and kextending between the guides, a`

base to which the guides are secured, and de* tachable means Jfor Securing'A thebase to the shuttle, said spring `holdir'ig the friction;

blocks andthe-base against the shuttle .when said means lare removed. v

4'. In a shuttle for looms, friction blocks orthe yarn, a pair ofspaced' guides for theblocls, a tension spring mounted on the shuttle and extending between Vthe guides,

a base to whichtheguid'es are secured, and, detachable vmeans for, securing'the base totheshuttle said spring holding the friction blocks and the base against the shuttle when said means areremovedandtending to move s'aidblocks and base toward the front of'the shuttle.- v f y5. In a shuttle for looms, friction blocks for the yarn, a Vresilient device 'to hold the blocks together, a pair offspaced'gui'de pins for the blocks and device/extending across a chamber'formed' in the shuttle toa point adjacent one-bound'ary ofthe chamber to prevent1ac'cidentaliremoval "of the blocks, a base to which the pins are secured, andremovable means for securing said base to the shuttle on the sidey ofthech-'amber opposite the endsofthe guide pins.

In testimony whereofv I have hereuntoy 

